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Definition of "Phase" |
Classification of an AC circuit usually single-phase, two wire or three wire; two-phase, three wire or four wire; or three-phase, three wire or four wire. / The angular relationship between two alternating currents or voltages when the voltage or current is plotted as a function of time. When the two are in phase, the angle is zero; both reach their peak simultaneously. When out of phase, one will lead or lag the other; that is, at the instant when one is at its peak, the other will not be at peak value and (depending on the phase angle) may differ in polarity as well as magnitude. / A term used to describe the quantity of cyclic electrical power sources in a high voltage system.Most commonly 1 phase or 3 phase. / (1) a notion used extensively in interpreting complex quantities such as Fourier series, Fourier transforms etc. Given a complex number c = x + iy = rcosϕ + i rsinϕ, then r represents the magnitude of c and ϕ the phase. |
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